Boro youngsters Dael Fry and Harry Chapman are among the Young Lions to have travelled to South Korea to contest the 24-team tournament.
Paul Simpson's side face Argentina in Jeonju on Saturday (kick-off 8:30, 16:30 local time) before matches against Guinea (23/5) and hosts South Korea (26/5) in Group A next week.
Fry was loaned out to Rotherham United for the first half of the season, with the second half of his campaign spent between Boro's Under-23s and senior side.
Chapman enjoyed a successful stint at League One title-winners Sheffield United, winning his second promotion from the third tier in two years. Following a prominent role in the first half of the season, the winger recovered from a troublesome ankle injury to feature in the Blades' final games of the season.